Machine for extruding metal.



0. L. SUMMEY.

MACHINE FOR EXTRUDING METAL.

APPLICATION FILED JULY 28, 1916.

1 ,3 1 7,2 38 a Patented Sept. 30, 1919.

6 SHEETSSHEET 1.

D. L. SUMMEY.

MACHINE FOR EXTRUDING METAL.

APPLICATIION FILED JULY 28'. l9l6.

1317 238, I I Patented Sept. 30, 1919.

6 SHEETS-SHEET 2.

DLL. SUMMEY.

MACHINE FOR EXTRUDING METAL.

APPUCATION HLED JULY 28.15MB

Patented Sept. 30, 1919.

6 SHEETS SHEET 3.

D. L. SUMMEY.

MACHINE FOR EXTRUDING METAL.

APPLlCAT lON FILED JULYY 28.19I6.

1 PS 1 7923 Patnted Sept. 30, 1919 Z 6 $HEETSSHEET 4.

65 i g r D. L. SUMMEY.

MACHINE FOR EXTRUDING METAL.

'APPLICATIGN FILED JULY 28.1916.

1 3 1 7 Patented Sept 30, L919.

6 SHEETS-SHEET 5.

0. L. SUMMEY. MACHINE roa EXTRUDING METAL.

Patented em. 30, 1919.

APPLICATI ON FILED JULY 213M916.

6 SHEETSSHET 6- DAVID L. SMEY, 01? WA.

.' URY, CONNECTICUT, iIGl-NGR T SCQL'W'UFAC- TUBING COMPANY, A CORPT101? @F CQNNECFICUT.

To all whom it may concern:

Be it known that 1, DAVID L. Summer, a

' citizen of the United States, residing at W'aterbury, county ofNewHaven, and State of Connecticut, have invented certain. new and usefulImprovements in Machines for Extruding Metal, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same.

This invention relates to machines for extruding metal.

Machines of this sort ordinarily include a ram, operating under highpressure, which.

acts on a billet to force the metal through a die thereby to form .arod, tube or the like.

The commercial success of such a machine' depends upon various features.For example, the machine should be strong and rugged on account of thegreat pressure inv heating, it is deemed expedient to cool the die aftereach extrusion; and to obtain a proper output the machine must operatewith substantial rapidity and without undue delay between extrusions.

- Extrusion machines as heretofore known have failed to attain theproper commercial standard because deficient along one or'more linessuch asthose mentioned It is the object of the present invention toprovide an extrusion press which is strong and rugged and which iscapable of a relatively wide range of use; one comparatively simple inits construction and arrangement and at the same time thoroughly,efi'ective in performing its functions; and, withal, a press capable ofoperation such that each" extrusion cycle is carried on with ra idityand the successive cycles are practica y non-intermitten't, so that theoutput produced sat-- isfies the demands of commercial require ments. I

The following specification describes and the accompanymg drawingsillustrate preferred embodiments of the invention, it being understoodthat changes may be made in the form, construction and arrangement ofthe parts without departing from the invention.

CHINE FOR G! METAL.

Specification of Letters Patent. Patented Sept, gill), 1919.;Application filed July 2%, 33.916. 7 serial No. 1.113%.

Figs. 3, i, 5 are views in cross-section, the I sections being taken onthe line 3-3, H and 5-5, respectively, of Fig. 2, looking in thedirection of the arrows;

Fig. 6 is a cross-sectional view taken onthe line 66 of Fig. 5, lookingin the direction of the arrows;

Fig. 7 is a cross-sectional view taken on the line 7-7 of Fig. 6;,

Fig. 8 is an enlarged detail showing the stop-latch in side elevation;

Fig. 9 is a similar view showing a horizontal cross-section of the same;4

Fig. 10 is a cross-sectional view taken on the line 1010 of Fig. 7,lookingin the direction of the arrows; 3

Fig. 11 is a detailed view showing, in

cross-section, a modification of a portion of the die-carrier;

.Fig. 12 is a diagrammatic view illustrating the piping and the like, bymeans of which the moving parts of the machine are operated-andcontrolled; and 1 Figs. 13 to 17 inclusive are diagrammatic views showirespectively, the position of the parts be ore extrusion; duringextrusion; following the severing-of the extruded part; following thewithdrawal of the stump on a cross-head 16, by means of a cellar 17' iwhich embraces the enlard end portion 18 Fit from the die; and followingexpulsion of of the ram and is securo? to a g": block 19 carried .by thecross-head. his crosshead is slidably mounted on four horizontal"columns 20 which pass through openings in two large abutments 21 and 21forming the main frame of the ress, these columns bein secured in placey locking members 22 t readed'onto the columns at the ends thereof andbearing against the abutments. The cross-head 16 is moved to drive theram forward by a hydraulic plunger 23 abutting against the guide block19 to which it is suitably secured and operating in a large hydrauliccylinder 2% supported by. the abutment 21 of the main frame. Thiscylinder is connected by a pipe 25 and a valve 25 hereinafter furthermentioned, with a water supply pipe leading from the pumps. Ad-.

IIllSSlOIl of water to the cylinder by means of the valve drives theplunger, and hence the cross-head and ram, forward Retraction of thecross-head to withdraw the ram is accomplished by two pair of draft rods26 located above and below the large ram cylinder. Each pair of rods isfastened at one end to a rib 27 on the cross-head 16, and at theopposite endto a yoke 28 arranged to slide on a track 29, and secured tothe end of a piston rod 30, the piston 31 of which operates in arelatively small bydraulic pull-back cylinder 32 suitably suported bythe main frame. These two pull- 1 ack cylinders are directly connectedby pipes 33 with the main water supply, thus being under constant pumppressure, so that their tendency is to move the cross-head and rambackward, but, owing to their relatively small size, their power is onlyefiective when the water pressure is removed from the largeramcylindei'.

The billet is held, during the operation of the extruding ram, by acontainer. 34: which is movable to and away from extrusion position.This container may be of a variety of constructions. In the embodimentshown,

-thecontainer consists of two concentric cylindrical sleeves 35 and 36,forming, in ef:

feet, a block having a .central billetchamcross-head 38 which carriesit. This crosshead, like the one carrying the ram, is slidably mountedon the columns 20. It has a central opening designed to receive theouter sleeve 36 of the container which is formed with an annularshoulder 39 bearing against the cross-head, and an annular groove inwhich fits a two-part ring 40 so as to bear against the other side ofthe cross-head. The two parts of the ring are secured togather by boltsas at 41 (Fig. 3). To move this container-carrying cross-head, it isattached at the sides to piston rods 42, the pistons 43 of which operatein hydraulic cylinders 44, these two cylinders being supported on eitherside of the large ram cylinder by the abutment 21. These cylinders areconnected at each end with the main water supply. A pipe 45, leadingfrom the end of the cylinder in which the piston rod enters, makes.direct connection with the supply pipe, while a pipe 46 at the other endleads to an intervening water-controlling valve 46. When this valveadmits waterto the cylinder, the pressure acts on an area larger thanthe area under constant pressure at the other end, and so overcomes thelatter and drives the piston forward to move the container towardextrusion positlon. When, however, the pressure is reurhoved by thevalve, the constant pressure at the other end becomes efi'ective andpauses the container to be withdrawn.

In extrusion machines constructed in accordance with the presentinvention, the

billet chamber is accessible, for insertion of the billet and forexpulsion'of the stump, at the end through which the metal is extruded,and provision is made for carrying up billets to the chamber for inser:tion therein and likewise for-carrying up interchangeable dies toposition the same in bodiment shown, this carrier is a horizontalreciprocating slide 47 hearing at top and bottom against a two-partextension 48 of the large abutment 21 and located so that it may be incontact with the container during extrusion. In order to move thecarrier, it is attached at one end (Fig. 5) to a piston rod 49, thepiston of which operates in a hydraulic cylinder 50 carried by theabutment extension 48. This cylinder is connected at each end, by pipes51 and 52, with the water-supply ipes, connection 51 having anintervening iydraulic valve 51*, so that when this valve admits water,the pressure causes'thepiston to force the rod out of. the cylinderagainst the constant pressure at the other end (the pressure acting on agreater area in that direction), and when pressure is removed by thevalve, the

constant pressure at the other end of the cyl inder moves the piston inthe opposite d1- rection.

In order to render the billet-chamber accessible for insertion of thebillet and removal of. the stump, hereinafter described, the slide iscutaway at each end to form deep ofisets 53 and 54 (Fig. 5) so that whenthe slide reaches either end of secured to the slide. The cradle thusformml' is designed to hold a billet 55 which is ordinarily cylindricalin shape, in a position transverse of the carrier and substantially atthe limit of the offset 53, as appears in Fig. 3, so that when thechamber is exposed by the movement of the carrier, the billet arness isin a position to be inserted in the chamber as hereinafter described.

This carrier, as before mentioned, also brings into position, oppositethe billetchamber, the die through which the metal is extruded. This maybe done in various ways. In the embodiment of the invention shown inFigs. 1 :to 7, secured to the face of the carrier toward the containeris a plurality of dies 56 centered on a line at right angles to the axisof the billet-chamber. These dies may be secured to the face of thecarrier in any suitable manner, as by bolts, and may be either flush orprojecting, as shown. These dies are interchangeable, and as either oneor the other can be placed in operative position, one may cool while theother is in use. Ordinarily these dies will be identical but they may,of course, differ as to the die-openings, the dies themselves beingstill interchangeable. For the purpose of illustration, only two dieshave been shown, but this number has been shown to simplify thedrawings, and as an example, and it is to be understood that theinvention is not limited 'to any precise number of dies. It may bedesirable to utilize more than two dies in order to give each die moretime to cool. In such oase,it is only necessary to lengthen the carrieraccordingly and duplicate the parts associated'with each die.

Since great pressure is exerted on the die during extrusion, it isnecessary to provide a strong backing. In the present instance, thisbacking is the die carrier itself. The central portion of the carrier isa thick, heavy block 57. Set in this block, immediately behind the die,is a thick cylinder 58 substantially larger in diameter than the die.This cylinder has a passage 59 therethrough registering with thedie-openingand being continued through a sleeve 60, also set in thelarge block 57, to the back of the carrier, whereby the extruded metalmay pass through the carrier as the rod is formed. The back of the largeblock 57 abuts at the top and bottom against the abutment extension 48(Fig. 7) and shoulders 61 on the top and bottom of the block fit incorresponding grooves in the abutment. Thus the die is backed; by thestrong heavy block of the carrier which, in turn, is rendered rigid,except for its transverse sliding movement, by being firmly anchored inthe heavy abutment head 21*.

The slide carrier takes, during the operation of the machine, a numberof different positions and to properly govern its movement, automaticstops are provided. At the billet-carrying end of the slide is a stop 62which makes contact with-the frame of the press to stop the carrier inbillet insertion position with the chamber exposed by the ofiset 54:. Atthe other end is a similar stop 63 which makes contact with the frame ofbillet-chamber for expulsion of the stump- F or the die centeringpositions, a latch 64 is provided, which enters notches '65 cut in theslide, there being onenotch for each die- This latch is attached to theend of a piston rod 66, the piston of which operates in an air cyllnder67 carried by the abutment 21 and supplied with air under pres sure by apipe 68. This pressure causes the latch to move into the notches as thecarrier slides past the same, withdrawal of the latch being efieeted bya coil-spring 69 which bears against the supporting frame at one end andagainst the piston at the other and which is of a force to act on thepiston to displace the piston rod when the air pressure is removed. Oneside of each notch is abrupt and the other side sloping, so that after abillet has been placed on its cradle, the carrier can move over tobilletinsertion position regardless of the latch which, though enteringthe notch, merely rides up the slope of the same. But when the carriermoves back to die-centering position and the latch slips into the notch,its contact with the abrupt face stops the carrier. Any notch may beallowed to pass by the latch by cutting oil the air from the cylinder,whereupon the latch. withdraws until air is again admitted.

' Tt may be desirable to have the interchangeable dies carried up toextrusion position in a difierent manner. For example, instead of havinga plurality of dies secured to the carrier, a number of interchangeableunattached dies may be used. In such case there is only one set of diebacking blocks and one notch for stopping the carrier and the carrier iscorrespondingly shortened.

The block 58 of the carrier is provided with a pin 5.8 (Fig. 11), eachdie 56 having in its back face a corresponding recess. When the carrieris in its billet-insertion position, a workman hangs one of the dies onthe pin 58, and it will thenbe carried into extrusion position asbefore. For the next extrusion another die is used, so that in. eithercase, namely, whether the unattached dies or the permanent dies areused, there is no cessation in the operation of the press while a die iscooling."

The invention includes means for insert ing the billet into the chamberafter it has been brought up into position by the carrier. Although thismay be accomplished in various ways, in the preferred form of theinvention a billet-pusher is provided in the form of a trough 70, whichis slidable in a Hit tached to the end of a piston rod 74, the

piston of which operates in an air cylinder 75, carried by the base 72.The cylinder is connected on each side of the piston with air pressuresupplying pipes 76 and 77, and air V ment with the die, also serves toreceive the extruded rod and act as a support for the same until the rodreaches suitable hearing I oflrolls (not shown).

To sever the extruded rod from the sprue, a cutter-is provided. Althoughthis cutting means may be of various constructions and arrangements, inthe present embodiment it is in the form of a drop-bar shears. Acurvedcutting plate 78 is secured to the end of a verticallyreciprocating ram 79 operating in a hydraulic cylinder 80 supported bycolumns 81 arising from the abutment ex} tension 48. The cylinder isconnected at each end with the water supply by pipes,82 and 83, pipe 82having an intervening valve 82*.v Pressure at this end acts on a greaterarea, so that when water is admitted by the.

valve, the cutting'ram is forced downward to cut the rod, and whenpressure is removed by. the. valve the constant pressure at the otherend becomes efi'ective and causes the ram to be withdrawn intoinoperative position. This cylinder is so located that the ram drops incloseproximity to the back of the die-carrier, so that the extruded rodis cut off at substantially the point where it emerges from the carrier.This leaves, connected to the sprue, a short stump representing themetal in the die and the passage through the carrier.

Fig. 12 illustrates diagrammatically the piping and control for theseveral cylinders. Suitable pumps, represented at 84:, feed water underhigh pressure to a main supply pipe 85 having branches leading to theinlet portions of the ram control valve 25, the container control valve46*, the carrier control valve 51 and the shears control valve 82,respectively. This supply pipe,

through its branches, also supplies water direct to the container,carrier and shears.

are identical and are of any suitable construction to control the inletand exhaust of arness water to and from their respective cylinders.These valves are operated by an air pressure system which also operatesother parts of the machine, as hereinafter appears, and

which includes a central control station 88 where the operator controlsthe entire operation of the press. At this central station is a numberof air pilot valves, twelve being I the other by manipulation of alever. Taking, for example, the inlet of the ram cylinder control valve25", this is opened and closed by a short piston rod 89, the piston ofwhich operates in an air cylinder 90, the ends of the cylinder beingconnected to pipes 91 and 92 leading to air pilot valve No. 1 at thecentral station. This latter can admit air into either pipe 91 or '92,to move the piston rod 89 one way or the other and thus to operate theinlet valve for the ram cylinder. The exhaust of this hydraulic valve 25is similarly controlled, and its operating cylinder 93 has two air pipes94 and 95 leading to air pilot valve No. 2 of the central station. valve46* for the container cylinders (which have a common feed pipe from thevalve so as to operate simultaneously) is controlled by pilot valvesNos. 3 and 4'; the valve 51 for the carrier cylinder by Nos. 8 and 9;and the valve 82 for the shears cylinder by Nos. 10 and 11. Pilot valveNo. 7 controls admission of air to the latch cylinder by pipe Similarly,the hydraulic control 68 and No. 12 controls admission of air to ing tothe pumps for lifting the pump valves to cut ed the flow withoutstopping the pumps.

In describing the operation of the press, it is assumed that the airpilot valves are operated to cause movements of the parts as described.In practice, the ram is not made to fit tightly in the container chamherbut a dummy block 96' which is tight fitting is placed in front of theram by a workman just before the ram enters the chamber, this blockbeing forced against the billet by the ram- For the purpose ofdescription, however, the dummy block will be treated as a part of theram itself. Assuming the ram, container, shears and pusher areinwithdrawn position and the carrier in the position shown in Fig. 3, abillet which has been previously heated is placed on the cradle 55 andthe carrier is movedover until the stop 62 strikes the frame of thepress, the latch meanwhile, if under air pressure, riding over theslopes of the notches. In this position, the billet is oparness positethe container which is moved up to within a short distance of thecarrier. The billetpusher is advanced, and, abutting against the billet,forces the latter into the chamber of the container, whereupon thetainer advances until it abuts against the carrier withthe chamberembracing the die, and the pusher is moved up to abut against the backor the carrier to act in its capacity of supporting trough. The pressisnow ready for extrusion and the ram is advanced against the billet,the pressure forcing the metal through the die, the extruded rod beingborne by the trough until it reaches the bearing 0d rolls. When all buta short dead end has been extruded, the ram is withdrawn and the shearsdropped to cut ofi the rod which is then free to be removed. To get ridof the stum and the sprue the container is moved ba-c this movement ofthe container first withdrawing the stump from the die and the carrierand then, as its backward stroke continues, bringing the sprue intocontact with the end of the ram which will cause sprue and stump (andalso the dummy block) to be ejected from the container chamber,whereupon they fall to the bottom of the press. This 'method of ex,-pelling the severed stump and sprue by movement of the container aids inattaining rapid operation of the press, since use for expulsion oi theslower moving ram may be avoided. it is noted that this expulsion of thestump occurs when the dontainer is removed from contact with die anddie-carrier, and it can take place any time during this backward strokeof the container after the stump clears the die, the precise pointdepending on the position of the ram. This, with the withdrawal of theparts to the starting point, completes the cycle of an extrusionoperation. While stump and sprue are being ejected the carrier, whichis, it

- will be noted, in proper position, is receiving a new billet and thecycle is repeated,

except that a diderent die is used so that the first one may cool.Although the carrier is not in exactly the same position. at the end ofeach cycle, such as above described, owing to the difference in positionof the several dies, it is nevertheless always in billet-receivingposition, inasmuch as the billet carrying cradle does not need toregister exactly with respect to a given point, so that whichever die isused, the movement of the carrier in the above cycle to position thedie, places the carrier. in billet-receiving position.

In case the sprue is wedged abnormally tightly in the chamber, or incaseof the freezing of an improperly heated billet, it is possible toutilize the force of the ram itseli to eject such sprue or billet, andthis method or expulsion entails a slightly different cycle ofoperations. after the ram is withdrawn, the container is moved back towithdraw the stump from the carrier and die, and the carrier (the latchbeing withdrawn) is moved over until ofiset 53 exposes the end of thechamber. Thereupon the ram is advanced and its great force expels thefrozen sprue or billet from the container, the latter being backed bythe slide during the expulsion operation, and the ejectedsprue, stumpand dummy block fall to the sloping plate which forms part of the slideand so roll away to the side of the press. Although this leaves thebillet-receiving end of the carrier further displaced than normally, it'may still be considered as in billet-receiving position, and a newbillet havingb'een placed on the cradle, the carrier is ready to bemoved over to billet-insertion, position'for the start of the nextcycle.

In case the unattached dies are utilized, the operation of the press isthe same as in such case,

above described, except that, While the car rier is in billet-insertionposition, the unattached die is hung bn the pin on the carrier by aworkman and when the carrier is moved back to withdraw the stump fromthe carrier and eject the same, the die and stump are withdrawn andejected together, the die being later removed from the stump by hand.

Many of the above movements described as being successiveare, in actualpractice, overlapping and even practically simultaneous, and as thereare no interruptions or undue delays for die cooling, stum removal andthe like, the operation 0 the press is'both rapid and continuous.

While the product of the extrusion has been referred .to as a rod, it isto be understood that this term is not a limitation and e 3. In amachine for extrudin truded, a die carrier movable across. the extrusionend of the chamber to position a die and to expose the end of thechamber for insertion of a billet.

metal, the combination with a metal-extra ing ram, of a container havinga billet-chamber through one end of which the metal is extruded, a

. die carrier movable across the extrusion a billet for insertion in thechamber and a die for the extrusion operation.

6. Ina machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, a billetand die carrier movable to the billet forinsertion in the charm er andthe die for the extrusion operation, and ipeans for inserting the billetin the cham- I. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, meansfor-placin a billet in position for insertion in the c amber, means forinserting the billet, and means for moving a die into osition for theextrusion operation.

8. n a machine for extruding metal, the combination with ametal-extruding ram of a container having a billet-chamber, an

a member movable across the end of the chamber to expose the same and tocarry a billet into position for insertion in the chamber and a die intoposition for extrusion.

9. ln amachine for extrudin metal, the combination with a metal-extra].ing ram, of a container having a billet-chamber, a billet and diecarriermovable to position a billet for insertion in the chamber and a die forthe extrusion operation, means for expelling the severed stump and spruefrom the chamber, the position of the carrier during stump expulsionplacing it in billet-receiving position. y 10. in a machine forextruding metal, the combination with a metal-extruding ram, of acontainer having a billet-chamber, a

billet and die carrier movable to place a' billet in position forinsertion in. the chainher, and to place a die in position forextrusion, the movement of said carrier to ositlon position the dieplacing the carrier in billetreoeiving position.

V 11. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-charm her, abillet'and die carrier movable to position a billet for insertion in thechamber and a die for the extrusion operation, said carrier also servingas a backing for the die during the o eration of the ram.

12. In a machine for extruding metal, the combination with a metalextruding ram, of a billet container, a die carrier movable across theaxis of the container, and a solid backing for anchoring said,diecarrier against motion in the direction of movement of said ram. L

13. In a machine for 'extruding metal,

the combination with a metal-extruding ram, of a container having abillet-chamber, a die, a member extending away from said chamber tosupport the extruded metal, said member being movable toward saidchamber to insert therein a billet previously positioned in alinementwith the chamber.

14. In a machine for extruding metal,

the combination with a metal-extruding ram, of a container having abillet-chamber, 83.1116, means for posltlomng a billet for insertion inthe chamber, a member movable to insert the billet, said member servingas a support for the extruded metal.

15. in a machine for extrudin metal,

the combination with a metal-extruding ram, of a container having abillet-chamber, and means Whereb the severed stump and sprue may beexpel ed by movement of the container.

16. in a machine for extrudin metal, the

combination Witha metal-extra in. ram, of a container hav ng abillet-chem er, said container being movable so as to bring the s rueand severed stump intocontact with t e ram, thereby to expel sprue andstump from the chamber.

17. in a machine for extrndin metal, the

combination with. a metal-extruding ram, of

a container havin a billet-chamber, and a die carrier movab e across theaxis of the chamber to expose the end of the chamber, thereby to permitthe severed stump and sprue to be ex elled from the chamber by movementof t cram.

18. In a machine for extrudin metal, the I combination with ametal-extru mg ram, of a container having a billet-chamber, a movabledie carrier, means for withdrawing the lib severed stump from saidcarrier, the carrier l bein *movable to expose the end of the chamber tereby to permit the stump and sprue to be expelled irom the chamber bymovement of the ram.

19. In a machine for extrudin combination with a metal-extra mg ram, ofa cointainerhaving a billetwhamber, a movmetal, the

arness able die carrier, the container bein movable to withdraw thesevered stump r m said carrier, the carrier being movable to expose theend of the chamber, thereby to permit the stum and sprue to be expelledfrom the cham or by the movement of the ram.

20. In a machine for extruding metal, the combination with ametal-extruding ram, of a container for a billet, a die and a supporttherefor through which the extruded metal passes, and means for cutting0d the extruded metal substantially at the point where it emerges fromsaid support.

21. he a machine for extruding metal, the combination with ametal-extruding ram, oil a container for a billet, a die and a supporttherei'orthrough which the extruded metal passes, means for cutting edthe extruded metal beyond the point where it emerges from'said support,and means for withdrawing the stump.

22. In a machine for extrudin metal, the combination with ametal-extruding ram, of a container for a billet, a die and a supporttherefor through which the extruded metal passes, and means for cuttin0d the extruded metal beyond the cunt where it emerges from the support,said container being movable to withdraw the stump,

23. In a machine for extruding metal, the combination" with ametal-extruding ram, of a container for a billet, a die anda supporttherefor through which the extruded metal passes, and means for cutting0d the extruded metal beyond the point where it emerges from thesupport, said container being movable to withdraw the stump and to expelthe stump and sprue.

24. In a machine for extruding metal, the combination with ametal-extruding ram, ot a container for a billet, a die and a carriertherefor through which the extruded metal passes, means for cutting offthe extruded metal beyond the point where it emerges from the carrier,and means for withdrawingthe stump, said die carrier being movable toexpose the chamber to permit expulsion of the sprue and stump bymovement of the ram.

25. In a machine for extruding metal, the combination with ametal-extruding ram, of a container for a billet, a die and a carriertherefor through which the extruded metal passes, and means for cuttingofi theextruded metal beyond the point where it emerges from thecarrier, the container being movable to withdraw the stump, and thecarrier being movable to expose the end of the chamber to permitexpulsion of the stump and sprue by movement of the ram.

26. In a machine for extruding metal, the

, combination with a metal-extruding ram, of

a billet-container. a die secured to-a support through WlllCl'l theextruded metal passes, and means for cutting ed the extruded metalbeyond the point where it emerges from said support, said containerbeing movable to withdraw the stump from the die.

27. In a machine for extruding metal, the combination withmetal-extruding rain, or a container having a billet-chamber, a

billet carrier movable with respect to said container for carryingbillets into position for insertion into the container, and means forautomatically stopping said carrier so as to position .the billet forinsertion in the chamber.

28. In a machine for extruding metal, the

llll

the chamber, and means for automatically stopping said carrier so as toposition the die for the extrusion operation.-

30. in a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billetchamber, a billet anddie carrier movable to carry up a billet for insertion in the chamberand to carry up a die into position for extrusion, and means forautomatically stopping said carrier in its billebinsertion position andin its die-positioning movement to placethe die in extrusion position.

31., In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, and meansfor successively placing interchangeable dies in operative position.

32. line machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, and a 1 diecarrier for successively placing interchangeable dles in operativeposition.

33. In a machine for extruding metal, the

combination with a metal-extrudingram, of

Film

lllll combination with a metal-extruding ram, of

a container having a billet-chamber, a plu-.

rality of interchangeable dies, and means rality of interchangeabledies, and means for successively placing said'dies in operation.

36. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, a pluralityof interchangeable dies, and means for placing in operative position anypredetermined die.

37. In. a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, and a diecarrier movable across the end of said chamber to carry one of aplurality of inter changeable dies into operative position for vextrusion.

38. In a machine for extruding metal, the combination with ametalextruding ram, of a container having a billet-chamber, and aplurality of dies carried by a die and billet carrier, said carrierbeing movable to expose the end of said chamber for insertion of thebillet, to place a die in operative position, and to expose the end ofsaid chamber for expulsion of the stump and sprue.

39. In a machine for extruding metal, the

combination with a metal-extruding ram, of a container having abillet-chamber, a d16 secured to a support, and means for withdrawingthe severed stump from the die.

40. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber, a diesecured to a support, said container being movable to withdraw thesevered stump from the die. o

41. In a machine for extruding metal, the combination with ametal-extruding ram. of a container having a billet-chamber, and a diesecured to a support. said container being movable away from the die andtoward the withdrawn ram. thereby to withdraw the severed stump from thedie and combination with a metal-extruding ram, of

a container having a billet-chamber, a plurality of interchangeabledies, and a billet and die carrier movable across the end of saidchamber to carry a billet to a position for insertion in said chamber,and to place any given die in position for extrusion.

44. In a machine for extruding metal. the combination with ametal-extruding ram, of a container having billeteharaher, a pla ralityof interchangeable dies, a billet and die carrier movable across the endof said chamber to carry a billet and the dies up to the chamber, meansfor automatically stopping said member to position the billet forinsertion in the chamber, and means for automatically stopping saidmember to place a given die in position for extrusion.

4 5. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet chamber, and a diecarrier movable across the end of said chamber, said containerbeingmovable toward the die carrier to abut against the same with the chamberembracing the die, and away from the die carrier during movement of thesame. I

46. In a machine for extruding metal, the combination with a metalextruding ram, of a container having a billet chamber, a billet and diecarrier movable across the. extrusion end of said chamber, means formoving said carrier to place a billet in position for in sertion in thechamber, means for inserting the billet, means for moving the carrier toplace a die in position for extrusion, means for cutting the extrudedmetal, and means for moving the container to withdraw the stump from thedie;

47. In a machine for extruding metal, the combination with a metalextruding ram, of a container having a billet chamber, a billet and diecarrier movable to carry upa bil let for insertion. in the chamber andto carry up a die into position for extrusion, a plurality of notchesassociated with said carrier, a latch movable into and out ofposition toengage said notches, and means for controlling said latch.

-48. In a machine for extruding metal, the combination with ametal-extruding ram, of a container havin a billet-chamber through oneend of whic. the metalis extruded, and a die carrier reciprocatingacrossthe extrusion end of the chamber to position a die and'toexpose the endof the chamber for insertion of a billet and expulsion of stump andsprue.

49. In a machine for extruding metal, the combination with ametal-extruding ram, of a movable billet-container, and a die carriermovable in a reciprocating path across the path of the container.

50. In a machine for extruding metal, the combination with ametal-extruding ram, of a container having a billet-chamber through oneend of which the metal is extruded, and

a a die carrier movable-in a reciprocating path across the extrusion endof the billet-chamber to'position a die and to expose the end of thebillet-chamber for insertion ofa billet,

51. In a machine for extruding metal, the. combination with ametal-extruding ram, of a container having. a billet-chamber, and abillet and die carrier reciprocating across the llii ' mamas axis of thecontainer to position a billet for insertion in the chamber and a. diefor the extrusion operation.

'52. In a machine for extruding metal, the combination with ametal-extruding rain, of a container having a billet-chamber, a billetand die carrier reciprocating across the axis of the container, a stopfor limiting the movement of saii carrier in either direction, a latchfor stopping said carrier in an at intermediate position, and means forcontrolling said latch.

- In testimony whereof, I have hereunto set my hand.

DAVID L. slum/tat.

